security: Convert LSM into a static interface
[linux-3.10.git] / security / dummy.c
1 /*
2  * Stub functions for the default security function pointers in case no
3  * security model is loaded.
4  *
5  * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
6  * Copyright (C) 2001-2002  Greg Kroah-Hartman <greg@kroah.com>
7  * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
8  *
9  *      This program is free software; you can redistribute it and/or modify
10  *      it under the terms of the GNU General Public License as published by
11  *      the Free Software Foundation; either version 2 of the License, or
12  *      (at your option) any later version.
13  */
14
15 #undef DEBUG
16
17 #include <linux/capability.h>
18 #include <linux/kernel.h>
19 #include <linux/mman.h>
20 #include <linux/pagemap.h>
21 #include <linux/swap.h>
22 #include <linux/security.h>
23 #include <linux/skbuff.h>
24 #include <linux/netlink.h>
25 #include <net/sock.h>
26 #include <linux/xattr.h>
27 #include <linux/hugetlb.h>
28 #include <linux/ptrace.h>
29 #include <linux/file.h>
30
31 static int dummy_ptrace (struct task_struct *parent, struct task_struct *child)
32 {
33         return 0;
34 }
35
36 static int dummy_capget (struct task_struct *target, kernel_cap_t * effective,
37                          kernel_cap_t * inheritable, kernel_cap_t * permitted)
38 {
39         *effective = *inheritable = *permitted = 0;
40         if (!issecure(SECURE_NOROOT)) {
41                 if (target->euid == 0) {
42                         *permitted |= (~0 & ~CAP_FS_MASK);
43                         *effective |= (~0 & ~CAP_TO_MASK(CAP_SETPCAP) & ~CAP_FS_MASK);
44                 }
45                 if (target->fsuid == 0) {
46                         *permitted |= CAP_FS_MASK;
47                         *effective |= CAP_FS_MASK;
48                 }
49         }
50         return 0;
51 }
52
53 static int dummy_capset_check (struct task_struct *target,
54                                kernel_cap_t * effective,
55                                kernel_cap_t * inheritable,
56                                kernel_cap_t * permitted)
57 {
58         return -EPERM;
59 }
60
61 static void dummy_capset_set (struct task_struct *target,
62                               kernel_cap_t * effective,
63                               kernel_cap_t * inheritable,
64                               kernel_cap_t * permitted)
65 {
66         return;
67 }
68
69 static int dummy_acct (struct file *file)
70 {
71         return 0;
72 }
73
74 static int dummy_capable (struct task_struct *tsk, int cap)
75 {
76         if (cap_raised (tsk->cap_effective, cap))
77                 return 0;
78         return -EPERM;
79 }
80
81 static int dummy_sysctl (ctl_table * table, int op)
82 {
83         return 0;
84 }
85
86 static int dummy_quotactl (int cmds, int type, int id, struct super_block *sb)
87 {
88         return 0;
89 }
90
91 static int dummy_quota_on (struct dentry *dentry)
92 {
93         return 0;
94 }
95
96 static int dummy_syslog (int type)
97 {
98         if ((type != 3 && type != 10) && current->euid)
99                 return -EPERM;
100         return 0;
101 }
102
103 static int dummy_settime(struct timespec *ts, struct timezone *tz)
104 {
105         if (!capable(CAP_SYS_TIME))
106                 return -EPERM;
107         return 0;
108 }
109
110 static int dummy_vm_enough_memory(struct mm_struct *mm, long pages)
111 {
112         int cap_sys_admin = 0;
113
114         if (dummy_capable(current, CAP_SYS_ADMIN) == 0)
115                 cap_sys_admin = 1;
116         return __vm_enough_memory(mm, pages, cap_sys_admin);
117 }
118
119 static int dummy_bprm_alloc_security (struct linux_binprm *bprm)
120 {
121         return 0;
122 }
123
124 static void dummy_bprm_free_security (struct linux_binprm *bprm)
125 {
126         return;
127 }
128
129 static void dummy_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
130 {
131         if (bprm->e_uid != current->uid || bprm->e_gid != current->gid) {
132                 set_dumpable(current->mm, suid_dumpable);
133
134                 if ((unsafe & ~LSM_UNSAFE_PTRACE_CAP) && !capable(CAP_SETUID)) {
135                         bprm->e_uid = current->uid;
136                         bprm->e_gid = current->gid;
137                 }
138         }
139
140         current->suid = current->euid = current->fsuid = bprm->e_uid;
141         current->sgid = current->egid = current->fsgid = bprm->e_gid;
142
143         dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
144 }
145
146 static void dummy_bprm_post_apply_creds (struct linux_binprm *bprm)
147 {
148         return;
149 }
150
151 static int dummy_bprm_set_security (struct linux_binprm *bprm)
152 {
153         return 0;
154 }
155
156 static int dummy_bprm_check_security (struct linux_binprm *bprm)
157 {
158         return 0;
159 }
160
161 static int dummy_bprm_secureexec (struct linux_binprm *bprm)
162 {
163         /* The new userland will simply use the value provided
164            in the AT_SECURE field to decide whether secure mode
165            is required.  Hence, this logic is required to preserve
166            the legacy decision algorithm used by the old userland. */
167         return (current->euid != current->uid ||
168                 current->egid != current->gid);
169 }
170
171 static int dummy_sb_alloc_security (struct super_block *sb)
172 {
173         return 0;
174 }
175
176 static void dummy_sb_free_security (struct super_block *sb)
177 {
178         return;
179 }
180
181 static int dummy_sb_copy_data (struct file_system_type *type,
182                                void *orig, void *copy)
183 {
184         return 0;
185 }
186
187 static int dummy_sb_kern_mount (struct super_block *sb, void *data)
188 {
189         return 0;
190 }
191
192 static int dummy_sb_statfs (struct dentry *dentry)
193 {
194         return 0;
195 }
196
197 static int dummy_sb_mount (char *dev_name, struct nameidata *nd, char *type,
198                            unsigned long flags, void *data)
199 {
200         return 0;
201 }
202
203 static int dummy_sb_check_sb (struct vfsmount *mnt, struct nameidata *nd)
204 {
205         return 0;
206 }
207
208 static int dummy_sb_umount (struct vfsmount *mnt, int flags)
209 {
210         return 0;
211 }
212
213 static void dummy_sb_umount_close (struct vfsmount *mnt)
214 {
215         return;
216 }
217
218 static void dummy_sb_umount_busy (struct vfsmount *mnt)
219 {
220         return;
221 }
222
223 static void dummy_sb_post_remount (struct vfsmount *mnt, unsigned long flags,
224                                    void *data)
225 {
226         return;
227 }
228
229
230 static void dummy_sb_post_mountroot (void)
231 {
232         return;
233 }
234
235 static void dummy_sb_post_addmount (struct vfsmount *mnt, struct nameidata *nd)
236 {
237         return;
238 }
239
240 static int dummy_sb_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
241 {
242         return 0;
243 }
244
245 static void dummy_sb_post_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
246 {
247         return;
248 }
249
250 static int dummy_inode_alloc_security (struct inode *inode)
251 {
252         return 0;
253 }
254
255 static void dummy_inode_free_security (struct inode *inode)
256 {
257         return;
258 }
259
260 static int dummy_inode_init_security (struct inode *inode, struct inode *dir,
261                                       char **name, void **value, size_t *len)
262 {
263         return -EOPNOTSUPP;
264 }
265
266 static int dummy_inode_create (struct inode *inode, struct dentry *dentry,
267                                int mask)
268 {
269         return 0;
270 }
271
272 static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode,
273                              struct dentry *new_dentry)
274 {
275         return 0;
276 }
277
278 static int dummy_inode_unlink (struct inode *inode, struct dentry *dentry)
279 {
280         return 0;
281 }
282
283 static int dummy_inode_symlink (struct inode *inode, struct dentry *dentry,
284                                 const char *name)
285 {
286         return 0;
287 }
288
289 static int dummy_inode_mkdir (struct inode *inode, struct dentry *dentry,
290                               int mask)
291 {
292         return 0;
293 }
294
295 static int dummy_inode_rmdir (struct inode *inode, struct dentry *dentry)
296 {
297         return 0;
298 }
299
300 static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry,
301                               int mode, dev_t dev)
302 {
303         return 0;
304 }
305
306 static int dummy_inode_rename (struct inode *old_inode,
307                                struct dentry *old_dentry,
308                                struct inode *new_inode,
309                                struct dentry *new_dentry)
310 {
311         return 0;
312 }
313
314 static int dummy_inode_readlink (struct dentry *dentry)
315 {
316         return 0;
317 }
318
319 static int dummy_inode_follow_link (struct dentry *dentry,
320                                     struct nameidata *nameidata)
321 {
322         return 0;
323 }
324
325 static int dummy_inode_permission (struct inode *inode, int mask, struct nameidata *nd)
326 {
327         return 0;
328 }
329
330 static int dummy_inode_setattr (struct dentry *dentry, struct iattr *iattr)
331 {
332         return 0;
333 }
334
335 static int dummy_inode_getattr (struct vfsmount *mnt, struct dentry *dentry)
336 {
337         return 0;
338 }
339
340 static void dummy_inode_delete (struct inode *ino)
341 {
342         return;
343 }
344
345 static int dummy_inode_setxattr (struct dentry *dentry, char *name, void *value,
346                                 size_t size, int flags)
347 {
348         if (!strncmp(name, XATTR_SECURITY_PREFIX,
349                      sizeof(XATTR_SECURITY_PREFIX) - 1) &&
350             !capable(CAP_SYS_ADMIN))
351                 return -EPERM;
352         return 0;
353 }
354
355 static void dummy_inode_post_setxattr (struct dentry *dentry, char *name, void *value,
356                                        size_t size, int flags)
357 {
358 }
359
360 static int dummy_inode_getxattr (struct dentry *dentry, char *name)
361 {
362         return 0;
363 }
364
365 static int dummy_inode_listxattr (struct dentry *dentry)
366 {
367         return 0;
368 }
369
370 static int dummy_inode_removexattr (struct dentry *dentry, char *name)
371 {
372         if (!strncmp(name, XATTR_SECURITY_PREFIX,
373                      sizeof(XATTR_SECURITY_PREFIX) - 1) &&
374             !capable(CAP_SYS_ADMIN))
375                 return -EPERM;
376         return 0;
377 }
378
379 static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void *buffer, size_t size, int err)
380 {
381         return -EOPNOTSUPP;
382 }
383
384 static int dummy_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
385 {
386         return -EOPNOTSUPP;
387 }
388
389 static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
390 {
391         return 0;
392 }
393
394 static const char *dummy_inode_xattr_getsuffix(void)
395 {
396         return NULL;
397 }
398
399 static int dummy_file_permission (struct file *file, int mask)
400 {
401         return 0;
402 }
403
404 static int dummy_file_alloc_security (struct file *file)
405 {
406         return 0;
407 }
408
409 static void dummy_file_free_security (struct file *file)
410 {
411         return;
412 }
413
414 static int dummy_file_ioctl (struct file *file, unsigned int command,
415                              unsigned long arg)
416 {
417         return 0;
418 }
419
420 static int dummy_file_mmap (struct file *file, unsigned long reqprot,
421                             unsigned long prot,
422                             unsigned long flags,
423                             unsigned long addr,
424                             unsigned long addr_only)
425 {
426         if (addr < mmap_min_addr)
427                 return -EACCES;
428         return 0;
429 }
430
431 static int dummy_file_mprotect (struct vm_area_struct *vma,
432                                 unsigned long reqprot,
433                                 unsigned long prot)
434 {
435         return 0;
436 }
437
438 static int dummy_file_lock (struct file *file, unsigned int cmd)
439 {
440         return 0;
441 }
442
443 static int dummy_file_fcntl (struct file *file, unsigned int cmd,
444                              unsigned long arg)
445 {
446         return 0;
447 }
448
449 static int dummy_file_set_fowner (struct file *file)
450 {
451         return 0;
452 }
453
454 static int dummy_file_send_sigiotask (struct task_struct *tsk,
455                                       struct fown_struct *fown, int sig)
456 {
457         return 0;
458 }
459
460 static int dummy_file_receive (struct file *file)
461 {
462         return 0;
463 }
464
465 static int dummy_dentry_open (struct file *file)
466 {
467         return 0;
468 }
469
470 static int dummy_task_create (unsigned long clone_flags)
471 {
472         return 0;
473 }
474
475 static int dummy_task_alloc_security (struct task_struct *p)
476 {
477         return 0;
478 }
479
480 static void dummy_task_free_security (struct task_struct *p)
481 {
482         return;
483 }
484
485 static int dummy_task_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
486 {
487         return 0;
488 }
489
490 static int dummy_task_post_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
491 {
492         dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
493         return 0;
494 }
495
496 static int dummy_task_setgid (gid_t id0, gid_t id1, gid_t id2, int flags)
497 {
498         return 0;
499 }
500
501 static int dummy_task_setpgid (struct task_struct *p, pid_t pgid)
502 {
503         return 0;
504 }
505
506 static int dummy_task_getpgid (struct task_struct *p)
507 {
508         return 0;
509 }
510
511 static int dummy_task_getsid (struct task_struct *p)
512 {
513         return 0;
514 }
515
516 static void dummy_task_getsecid (struct task_struct *p, u32 *secid)
517 { }
518
519 static int dummy_task_setgroups (struct group_info *group_info)
520 {
521         return 0;
522 }
523
524 static int dummy_task_setnice (struct task_struct *p, int nice)
525 {
526         return 0;
527 }
528
529 static int dummy_task_setioprio (struct task_struct *p, int ioprio)
530 {
531         return 0;
532 }
533
534 static int dummy_task_getioprio (struct task_struct *p)
535 {
536         return 0;
537 }
538
539 static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim)
540 {
541         return 0;
542 }
543
544 static int dummy_task_setscheduler (struct task_struct *p, int policy,
545                                     struct sched_param *lp)
546 {
547         return 0;
548 }
549
550 static int dummy_task_getscheduler (struct task_struct *p)
551 {
552         return 0;
553 }
554
555 static int dummy_task_movememory (struct task_struct *p)
556 {
557         return 0;
558 }
559
560 static int dummy_task_wait (struct task_struct *p)
561 {
562         return 0;
563 }
564
565 static int dummy_task_kill (struct task_struct *p, struct siginfo *info,
566                             int sig, u32 secid)
567 {
568         return 0;
569 }
570
571 static int dummy_task_prctl (int option, unsigned long arg2, unsigned long arg3,
572                              unsigned long arg4, unsigned long arg5)
573 {
574         return 0;
575 }
576
577 static void dummy_task_reparent_to_init (struct task_struct *p)
578 {
579         p->euid = p->fsuid = 0;
580         return;
581 }
582
583 static void dummy_task_to_inode(struct task_struct *p, struct inode *inode)
584 { }
585
586 static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag)
587 {
588         return 0;
589 }
590
591 static int dummy_msg_msg_alloc_security (struct msg_msg *msg)
592 {
593         return 0;
594 }
595
596 static void dummy_msg_msg_free_security (struct msg_msg *msg)
597 {
598         return;
599 }
600
601 static int dummy_msg_queue_alloc_security (struct msg_queue *msq)
602 {
603         return 0;
604 }
605
606 static void dummy_msg_queue_free_security (struct msg_queue *msq)
607 {
608         return;
609 }
610
611 static int dummy_msg_queue_associate (struct msg_queue *msq, 
612                                       int msqflg)
613 {
614         return 0;
615 }
616
617 static int dummy_msg_queue_msgctl (struct msg_queue *msq, int cmd)
618 {
619         return 0;
620 }
621
622 static int dummy_msg_queue_msgsnd (struct msg_queue *msq, struct msg_msg *msg,
623                                    int msgflg)
624 {
625         return 0;
626 }
627
628 static int dummy_msg_queue_msgrcv (struct msg_queue *msq, struct msg_msg *msg,
629                                    struct task_struct *target, long type,
630                                    int mode)
631 {
632         return 0;
633 }
634
635 static int dummy_shm_alloc_security (struct shmid_kernel *shp)
636 {
637         return 0;
638 }
639
640 static void dummy_shm_free_security (struct shmid_kernel *shp)
641 {
642         return;
643 }
644
645 static int dummy_shm_associate (struct shmid_kernel *shp, int shmflg)
646 {
647         return 0;
648 }
649
650 static int dummy_shm_shmctl (struct shmid_kernel *shp, int cmd)
651 {
652         return 0;
653 }
654
655 static int dummy_shm_shmat (struct shmid_kernel *shp, char __user *shmaddr,
656                             int shmflg)
657 {
658         return 0;
659 }
660
661 static int dummy_sem_alloc_security (struct sem_array *sma)
662 {
663         return 0;
664 }
665
666 static void dummy_sem_free_security (struct sem_array *sma)
667 {
668         return;
669 }
670
671 static int dummy_sem_associate (struct sem_array *sma, int semflg)
672 {
673         return 0;
674 }
675
676 static int dummy_sem_semctl (struct sem_array *sma, int cmd)
677 {
678         return 0;
679 }
680
681 static int dummy_sem_semop (struct sem_array *sma, 
682                             struct sembuf *sops, unsigned nsops, int alter)
683 {
684         return 0;
685 }
686
687 static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb)
688 {
689         NETLINK_CB(skb).eff_cap = current->cap_effective;
690         return 0;
691 }
692
693 static int dummy_netlink_recv (struct sk_buff *skb, int cap)
694 {
695         if (!cap_raised (NETLINK_CB (skb).eff_cap, cap))
696                 return -EPERM;
697         return 0;
698 }
699
700 #ifdef CONFIG_SECURITY_NETWORK
701 static int dummy_unix_stream_connect (struct socket *sock,
702                                       struct socket *other,
703                                       struct sock *newsk)
704 {
705         return 0;
706 }
707
708 static int dummy_unix_may_send (struct socket *sock,
709                                 struct socket *other)
710 {
711         return 0;
712 }
713
714 static int dummy_socket_create (int family, int type,
715                                 int protocol, int kern)
716 {
717         return 0;
718 }
719
720 static int dummy_socket_post_create (struct socket *sock, int family, int type,
721                                      int protocol, int kern)
722 {
723         return 0;
724 }
725
726 static int dummy_socket_bind (struct socket *sock, struct sockaddr *address,
727                               int addrlen)
728 {
729         return 0;
730 }
731
732 static int dummy_socket_connect (struct socket *sock, struct sockaddr *address,
733                                  int addrlen)
734 {
735         return 0;
736 }
737
738 static int dummy_socket_listen (struct socket *sock, int backlog)
739 {
740         return 0;
741 }
742
743 static int dummy_socket_accept (struct socket *sock, struct socket *newsock)
744 {
745         return 0;
746 }
747
748 static void dummy_socket_post_accept (struct socket *sock, 
749                                       struct socket *newsock)
750 {
751         return;
752 }
753
754 static int dummy_socket_sendmsg (struct socket *sock, struct msghdr *msg,
755                                  int size)
756 {
757         return 0;
758 }
759
760 static int dummy_socket_recvmsg (struct socket *sock, struct msghdr *msg,
761                                  int size, int flags)
762 {
763         return 0;
764 }
765
766 static int dummy_socket_getsockname (struct socket *sock)
767 {
768         return 0;
769 }
770
771 static int dummy_socket_getpeername (struct socket *sock)
772 {
773         return 0;
774 }
775
776 static int dummy_socket_setsockopt (struct socket *sock, int level, int optname)
777 {
778         return 0;
779 }
780
781 static int dummy_socket_getsockopt (struct socket *sock, int level, int optname)
782 {
783         return 0;
784 }
785
786 static int dummy_socket_shutdown (struct socket *sock, int how)
787 {
788         return 0;
789 }
790
791 static int dummy_socket_sock_rcv_skb (struct sock *sk, struct sk_buff *skb)
792 {
793         return 0;
794 }
795
796 static int dummy_socket_getpeersec_stream(struct socket *sock, char __user *optval,
797                                           int __user *optlen, unsigned len)
798 {
799         return -ENOPROTOOPT;
800 }
801
802 static int dummy_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
803 {
804         return -ENOPROTOOPT;
805 }
806
807 static inline int dummy_sk_alloc_security (struct sock *sk, int family, gfp_t priority)
808 {
809         return 0;
810 }
811
812 static inline void dummy_sk_free_security (struct sock *sk)
813 {
814 }
815
816 static inline void dummy_sk_clone_security (const struct sock *sk, struct sock *newsk)
817 {
818 }
819
820 static inline void dummy_sk_getsecid(struct sock *sk, u32 *secid)
821 {
822 }
823
824 static inline void dummy_sock_graft(struct sock* sk, struct socket *parent)
825 {
826 }
827
828 static inline int dummy_inet_conn_request(struct sock *sk,
829                         struct sk_buff *skb, struct request_sock *req)
830 {
831         return 0;
832 }
833
834 static inline void dummy_inet_csk_clone(struct sock *newsk,
835                         const struct request_sock *req)
836 {
837 }
838
839 static inline void dummy_inet_conn_established(struct sock *sk,
840                         struct sk_buff *skb)
841 {
842 }
843
844 static inline void dummy_req_classify_flow(const struct request_sock *req,
845                         struct flowi *fl)
846 {
847 }
848 #endif  /* CONFIG_SECURITY_NETWORK */
849
850 #ifdef CONFIG_SECURITY_NETWORK_XFRM
851 static int dummy_xfrm_policy_alloc_security(struct xfrm_policy *xp,
852                 struct xfrm_user_sec_ctx *sec_ctx)
853 {
854         return 0;
855 }
856
857 static inline int dummy_xfrm_policy_clone_security(struct xfrm_policy *old, struct xfrm_policy *new)
858 {
859         return 0;
860 }
861
862 static void dummy_xfrm_policy_free_security(struct xfrm_policy *xp)
863 {
864 }
865
866 static int dummy_xfrm_policy_delete_security(struct xfrm_policy *xp)
867 {
868         return 0;
869 }
870
871 static int dummy_xfrm_state_alloc_security(struct xfrm_state *x,
872         struct xfrm_user_sec_ctx *sec_ctx, u32 secid)
873 {
874         return 0;
875 }
876
877 static void dummy_xfrm_state_free_security(struct xfrm_state *x)
878 {
879 }
880
881 static int dummy_xfrm_state_delete_security(struct xfrm_state *x)
882 {
883         return 0;
884 }
885
886 static int dummy_xfrm_policy_lookup(struct xfrm_policy *xp, u32 sk_sid, u8 dir)
887 {
888         return 0;
889 }
890
891 static int dummy_xfrm_state_pol_flow_match(struct xfrm_state *x,
892                                 struct xfrm_policy *xp, struct flowi *fl)
893 {
894         return 1;
895 }
896
897 static int dummy_xfrm_decode_session(struct sk_buff *skb, u32 *fl, int ckall)
898 {
899         return 0;
900 }
901
902 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
903 static int dummy_register_security (const char *name, struct security_operations *ops)
904 {
905         return -EINVAL;
906 }
907
908 static int dummy_unregister_security (const char *name, struct security_operations *ops)
909 {
910         return -EINVAL;
911 }
912
913 static void dummy_d_instantiate (struct dentry *dentry, struct inode *inode)
914 {
915         return;
916 }
917
918 static int dummy_getprocattr(struct task_struct *p, char *name, char **value)
919 {
920         return -EINVAL;
921 }
922
923 static int dummy_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
924 {
925         return -EINVAL;
926 }
927
928 static int dummy_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
929 {
930         return -EOPNOTSUPP;
931 }
932
933 static void dummy_release_secctx(char *secdata, u32 seclen)
934 {
935 }
936
937 #ifdef CONFIG_KEYS
938 static inline int dummy_key_alloc(struct key *key, struct task_struct *ctx,
939                                   unsigned long flags)
940 {
941         return 0;
942 }
943
944 static inline void dummy_key_free(struct key *key)
945 {
946 }
947
948 static inline int dummy_key_permission(key_ref_t key_ref,
949                                        struct task_struct *context,
950                                        key_perm_t perm)
951 {
952         return 0;
953 }
954 #endif /* CONFIG_KEYS */
955
956 struct security_operations dummy_security_ops;
957
958 #define set_to_dummy_if_null(ops, function)                             \
959         do {                                                            \
960                 if (!ops->function) {                                   \
961                         ops->function = dummy_##function;               \
962                         pr_debug("Had to override the " #function       \
963                                  " security operation with the dummy one.\n");\
964                         }                                               \
965         } while (0)
966
967 void security_fixup_ops (struct security_operations *ops)
968 {
969         set_to_dummy_if_null(ops, ptrace);
970         set_to_dummy_if_null(ops, capget);
971         set_to_dummy_if_null(ops, capset_check);
972         set_to_dummy_if_null(ops, capset_set);
973         set_to_dummy_if_null(ops, acct);
974         set_to_dummy_if_null(ops, capable);
975         set_to_dummy_if_null(ops, quotactl);
976         set_to_dummy_if_null(ops, quota_on);
977         set_to_dummy_if_null(ops, sysctl);
978         set_to_dummy_if_null(ops, syslog);
979         set_to_dummy_if_null(ops, settime);
980         set_to_dummy_if_null(ops, vm_enough_memory);
981         set_to_dummy_if_null(ops, bprm_alloc_security);
982         set_to_dummy_if_null(ops, bprm_free_security);
983         set_to_dummy_if_null(ops, bprm_apply_creds);
984         set_to_dummy_if_null(ops, bprm_post_apply_creds);
985         set_to_dummy_if_null(ops, bprm_set_security);
986         set_to_dummy_if_null(ops, bprm_check_security);
987         set_to_dummy_if_null(ops, bprm_secureexec);
988         set_to_dummy_if_null(ops, sb_alloc_security);
989         set_to_dummy_if_null(ops, sb_free_security);
990         set_to_dummy_if_null(ops, sb_copy_data);
991         set_to_dummy_if_null(ops, sb_kern_mount);
992         set_to_dummy_if_null(ops, sb_statfs);
993         set_to_dummy_if_null(ops, sb_mount);
994         set_to_dummy_if_null(ops, sb_check_sb);
995         set_to_dummy_if_null(ops, sb_umount);
996         set_to_dummy_if_null(ops, sb_umount_close);
997         set_to_dummy_if_null(ops, sb_umount_busy);
998         set_to_dummy_if_null(ops, sb_post_remount);
999         set_to_dummy_if_null(ops, sb_post_mountroot);
1000         set_to_dummy_if_null(ops, sb_post_addmount);
1001         set_to_dummy_if_null(ops, sb_pivotroot);
1002         set_to_dummy_if_null(ops, sb_post_pivotroot);
1003         set_to_dummy_if_null(ops, inode_alloc_security);
1004         set_to_dummy_if_null(ops, inode_free_security);
1005         set_to_dummy_if_null(ops, inode_init_security);
1006         set_to_dummy_if_null(ops, inode_create);
1007         set_to_dummy_if_null(ops, inode_link);
1008         set_to_dummy_if_null(ops, inode_unlink);
1009         set_to_dummy_if_null(ops, inode_symlink);
1010         set_to_dummy_if_null(ops, inode_mkdir);
1011         set_to_dummy_if_null(ops, inode_rmdir);
1012         set_to_dummy_if_null(ops, inode_mknod);
1013         set_to_dummy_if_null(ops, inode_rename);
1014         set_to_dummy_if_null(ops, inode_readlink);
1015         set_to_dummy_if_null(ops, inode_follow_link);
1016         set_to_dummy_if_null(ops, inode_permission);
1017         set_to_dummy_if_null(ops, inode_setattr);
1018         set_to_dummy_if_null(ops, inode_getattr);
1019         set_to_dummy_if_null(ops, inode_delete);
1020         set_to_dummy_if_null(ops, inode_setxattr);
1021         set_to_dummy_if_null(ops, inode_post_setxattr);
1022         set_to_dummy_if_null(ops, inode_getxattr);
1023         set_to_dummy_if_null(ops, inode_listxattr);
1024         set_to_dummy_if_null(ops, inode_removexattr);
1025         set_to_dummy_if_null(ops, inode_xattr_getsuffix);
1026         set_to_dummy_if_null(ops, inode_getsecurity);
1027         set_to_dummy_if_null(ops, inode_setsecurity);
1028         set_to_dummy_if_null(ops, inode_listsecurity);
1029         set_to_dummy_if_null(ops, file_permission);
1030         set_to_dummy_if_null(ops, file_alloc_security);
1031         set_to_dummy_if_null(ops, file_free_security);
1032         set_to_dummy_if_null(ops, file_ioctl);
1033         set_to_dummy_if_null(ops, file_mmap);
1034         set_to_dummy_if_null(ops, file_mprotect);
1035         set_to_dummy_if_null(ops, file_lock);
1036         set_to_dummy_if_null(ops, file_fcntl);
1037         set_to_dummy_if_null(ops, file_set_fowner);
1038         set_to_dummy_if_null(ops, file_send_sigiotask);
1039         set_to_dummy_if_null(ops, file_receive);
1040         set_to_dummy_if_null(ops, dentry_open);
1041         set_to_dummy_if_null(ops, task_create);
1042         set_to_dummy_if_null(ops, task_alloc_security);
1043         set_to_dummy_if_null(ops, task_free_security);
1044         set_to_dummy_if_null(ops, task_setuid);
1045         set_to_dummy_if_null(ops, task_post_setuid);
1046         set_to_dummy_if_null(ops, task_setgid);
1047         set_to_dummy_if_null(ops, task_setpgid);
1048         set_to_dummy_if_null(ops, task_getpgid);
1049         set_to_dummy_if_null(ops, task_getsid);
1050         set_to_dummy_if_null(ops, task_getsecid);
1051         set_to_dummy_if_null(ops, task_setgroups);
1052         set_to_dummy_if_null(ops, task_setnice);
1053         set_to_dummy_if_null(ops, task_setioprio);
1054         set_to_dummy_if_null(ops, task_getioprio);
1055         set_to_dummy_if_null(ops, task_setrlimit);
1056         set_to_dummy_if_null(ops, task_setscheduler);
1057         set_to_dummy_if_null(ops, task_getscheduler);
1058         set_to_dummy_if_null(ops, task_movememory);
1059         set_to_dummy_if_null(ops, task_wait);
1060         set_to_dummy_if_null(ops, task_kill);
1061         set_to_dummy_if_null(ops, task_prctl);
1062         set_to_dummy_if_null(ops, task_reparent_to_init);
1063         set_to_dummy_if_null(ops, task_to_inode);
1064         set_to_dummy_if_null(ops, ipc_permission);
1065         set_to_dummy_if_null(ops, msg_msg_alloc_security);
1066         set_to_dummy_if_null(ops, msg_msg_free_security);
1067         set_to_dummy_if_null(ops, msg_queue_alloc_security);
1068         set_to_dummy_if_null(ops, msg_queue_free_security);
1069         set_to_dummy_if_null(ops, msg_queue_associate);
1070         set_to_dummy_if_null(ops, msg_queue_msgctl);
1071         set_to_dummy_if_null(ops, msg_queue_msgsnd);
1072         set_to_dummy_if_null(ops, msg_queue_msgrcv);
1073         set_to_dummy_if_null(ops, shm_alloc_security);
1074         set_to_dummy_if_null(ops, shm_free_security);
1075         set_to_dummy_if_null(ops, shm_associate);
1076         set_to_dummy_if_null(ops, shm_shmctl);
1077         set_to_dummy_if_null(ops, shm_shmat);
1078         set_to_dummy_if_null(ops, sem_alloc_security);
1079         set_to_dummy_if_null(ops, sem_free_security);
1080         set_to_dummy_if_null(ops, sem_associate);
1081         set_to_dummy_if_null(ops, sem_semctl);
1082         set_to_dummy_if_null(ops, sem_semop);
1083         set_to_dummy_if_null(ops, netlink_send);
1084         set_to_dummy_if_null(ops, netlink_recv);
1085         set_to_dummy_if_null(ops, register_security);
1086         set_to_dummy_if_null(ops, unregister_security);
1087         set_to_dummy_if_null(ops, d_instantiate);
1088         set_to_dummy_if_null(ops, getprocattr);
1089         set_to_dummy_if_null(ops, setprocattr);
1090         set_to_dummy_if_null(ops, secid_to_secctx);
1091         set_to_dummy_if_null(ops, release_secctx);
1092 #ifdef CONFIG_SECURITY_NETWORK
1093         set_to_dummy_if_null(ops, unix_stream_connect);
1094         set_to_dummy_if_null(ops, unix_may_send);
1095         set_to_dummy_if_null(ops, socket_create);
1096         set_to_dummy_if_null(ops, socket_post_create);
1097         set_to_dummy_if_null(ops, socket_bind);
1098         set_to_dummy_if_null(ops, socket_connect);
1099         set_to_dummy_if_null(ops, socket_listen);
1100         set_to_dummy_if_null(ops, socket_accept);
1101         set_to_dummy_if_null(ops, socket_post_accept);
1102         set_to_dummy_if_null(ops, socket_sendmsg);
1103         set_to_dummy_if_null(ops, socket_recvmsg);
1104         set_to_dummy_if_null(ops, socket_getsockname);
1105         set_to_dummy_if_null(ops, socket_getpeername);
1106         set_to_dummy_if_null(ops, socket_setsockopt);
1107         set_to_dummy_if_null(ops, socket_getsockopt);
1108         set_to_dummy_if_null(ops, socket_shutdown);
1109         set_to_dummy_if_null(ops, socket_sock_rcv_skb);
1110         set_to_dummy_if_null(ops, socket_getpeersec_stream);
1111         set_to_dummy_if_null(ops, socket_getpeersec_dgram);
1112         set_to_dummy_if_null(ops, sk_alloc_security);
1113         set_to_dummy_if_null(ops, sk_free_security);
1114         set_to_dummy_if_null(ops, sk_clone_security);
1115         set_to_dummy_if_null(ops, sk_getsecid);
1116         set_to_dummy_if_null(ops, sock_graft);
1117         set_to_dummy_if_null(ops, inet_conn_request);
1118         set_to_dummy_if_null(ops, inet_csk_clone);
1119         set_to_dummy_if_null(ops, inet_conn_established);
1120         set_to_dummy_if_null(ops, req_classify_flow);
1121  #endif /* CONFIG_SECURITY_NETWORK */
1122 #ifdef  CONFIG_SECURITY_NETWORK_XFRM
1123         set_to_dummy_if_null(ops, xfrm_policy_alloc_security);
1124         set_to_dummy_if_null(ops, xfrm_policy_clone_security);
1125         set_to_dummy_if_null(ops, xfrm_policy_free_security);
1126         set_to_dummy_if_null(ops, xfrm_policy_delete_security);
1127         set_to_dummy_if_null(ops, xfrm_state_alloc_security);
1128         set_to_dummy_if_null(ops, xfrm_state_free_security);
1129         set_to_dummy_if_null(ops, xfrm_state_delete_security);
1130         set_to_dummy_if_null(ops, xfrm_policy_lookup);
1131         set_to_dummy_if_null(ops, xfrm_state_pol_flow_match);
1132         set_to_dummy_if_null(ops, xfrm_decode_session);
1133 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
1134 #ifdef CONFIG_KEYS
1135         set_to_dummy_if_null(ops, key_alloc);
1136         set_to_dummy_if_null(ops, key_free);
1137         set_to_dummy_if_null(ops, key_permission);
1138 #endif  /* CONFIG_KEYS */
1139
1140 }
1141